Key chain



FIG. 1 is a perspective view of a key chain;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top plan view thereof.

The broken line showing of a key chain is for the purpose ofillustrating environmental structure and forms no part of the claimeddesign.

The ornamental design for a key chain, as shown and described.